Improvement in stoves



' e. s. e. SPENCE.

Heating Stove. N0. 25,222. Patented "Aug. 23, I859.

f I v 1/ y z 1 a F I 5 if k v l I Invent-0 7':

UNITED STATES ATENT OFFICE.

IMPROVEMENT IN STOVES.

Specification forming part of Letters Patent No. 25,222, dated August 23, 1859.

To all whom it may concern:

Be it known that I, GEORGE S. G. SPENCE, of Boston, in the county of Suffolk and State of Massachusetts, have invented an Improvement in Stoves or Chambers for Combustion of Fuel; and I do hereby declare the same to be fully described and represented in the following specification and the accompanying drawing, such drawing exhibiting a longitudinal section of a stove furnished with my invention or improvement.

The principal object of such invention is the better or more perfect combustion of the smoke and gaseous or volatile products that may escape from the fuel while it may be in a state of ignition.

In the drawing, A exhibits a common parlor-stove of the upright kind, a being its furnace or chamber of combustion; b, the grate thereof; 0, the ash-chamber, and d the door for the fuel-supplying opening 6. Within the chamber of combustion, and so as to rest on the top surface of the fuel when such chamber may be charged, I suspend or place a gas retainer and distributer, B, which I prefer to construct of a cup or bell shape, and arrange it with its open end resting on the fuel, the said device 13 being somewhat less in width or diameter externally than that of the interior of the chamber of combustion. In order to enable the gas-distributer B to be easily withdrawn from or elevated in the chamber, it may have a chain, f, or its equivalent, anixed to it and the cover or other proper part of the stove, such chain being of suflicient length to allow the distributer B to descend in the chamber and maintain its position on the fuel, in proportion as such fuel may be consumed. Furthermore, I apply to the air-register g of the door d a deflector-plate, h, arranged so as to cause the air after having passed through the register to be deflected directly downward upon the ignited surface of the fuel and there mingle with the gases as they escape from it.

The gas retainer and distributer, to rest on the fuel and fall with it in proportion to its consumption, will cause a very large amount of the gaseous products of combustion that might otherwise escape through the dischargefiue 7.; to be retained and forced to pass back into the coal or underneath the rim 0*, so as to keep the fuel in a state of greater ignition at its external boundary when it is against the inner surface of the furnace. In this way the gases will not only be consumed to the best advantage, but the interior combustion of the fuel will be maintained close against the sides of the fire-pot, the same serving greatlyto increase the amount of heat radiated from the stove.

In respect to the door-deflector, itprevents the supply of air through the register from passing directly upward toward the dischargefiue, as it is otherwise likely to do. The air, being thus thrown into contact with the fuel when in its greatest ignition, operates to the best advantage.

From the above it Will be seen that the air for aiding combustion of the fuel may be mostly, if not entirely, supplied through the door-register, the deflecting-plate of which will contribute greatly to facilitate such combustion.

There may-be other forms adopted for the deflector B to rest on and descend with the fuel while it is being consumed; but I prefer that shown in the drawing, which is bellshaped.

I am aware that flat plates of metal have been used on the surface of the fuel in a coalstove when such plates lie loosely and uncontrolled. I do not therefore claim such devices; but

hat I claim as my invention, and desire to secure by Letters Patent, is

1. The use of the conical inverted cup B, combined with the chain f, or its equivalent, in the manner and for the purpose set forth.

2. The combination of the air-deflector with the fire-place door-register, and so as to operate therewith and deflect the entering currents of air upon or toward the ignited surface of the fuel, as described.

GEO. s. G. SPENCE.

Witnesses:

F. P. HALE, J r., R. H. EDDY. 

